In those halcyon days of television variety, when ABC's The Hollywood Palace rubbed shoulders with CBS's The Ed Sullivan Show, it wasn't hard to spot the music-making King Family.  After all, the ensemble was more than 30 members strong, consisting of big band sweethearts The King Sisters, guitarist Alvino Rey, and some 32 brothers, sisters, children, wives, aunts and uncles.  Following much-talked-about appearances on Hollywood Palace, The King Family went on to headline its own variety show